Knitwear is its own category in textile design. After studying at the Hochschule für Gestaltung in Zurich, Tina Grässli and Barbara Rüegg developed a reversible plaid pattern on the knitting machine. They founded their own label Xess+Baba in 1994 to market their knitted jackets and caps. Christa Michel, also trained in Zurich, uses the knitting machine to render images and photographs as fabric: each pixel corresponds to a stitch. She produces jacquard sweaters but also art objects.